What if all those variables aren’t numeric even? A mosaic – or Mekko – chart plot might be the better choice. Perhaps a market analyst, for example, wants to compare more than the size of various mobile-phone markets. What if, instead, he or she needs to compare the size of the user bases, as well as the age groups within each group?Ī mosaic chart would allow said marketer to illustrate all the variables in a clear and straightforward manner. In the above example, one axis of the chart represents the categories being compared – mobile phone manufacturers – while the other axis lists various age ranges. The size and color of each cross-section of the chart corresponds with the market segment it represents, as depicted in the chart's legend. Market segments are often divided based on age and gender, and a population pyramid is an ideal visual representation of the two groups. The graph classically takes on the shape of a pyramid when a population is healthy and growing - the largest groups are the youngest, and each gender dwindles somewhat equally as the population ages, leaving the smallest groups at the top of the graph.Ī population pyramid that veers away from its classic shape might indicate an irregularity in a population during a particular period, such as a famine or an economic boom that led to an increase in deaths or births. Of course, population pyramids aren’t always used to compare populations by age, and therefore don’t always take on the graph’s namesake shape.Ī marketer, for example, might use the design to compare a population by income, weight or IQ, in which the smallest groups will often be at both the top and bottom.
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